package com.mmall.concurrency.example.atomic;

import com.mmall.concurrency.annoation.ThreadSafe;
import lombok.extern.slf4j.Slf4j;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicInteger;

@Slf4j
@ThreadSafe
public class AtomicExample1 {

    //请求总数
    public static int clientTotal = 5000;

    //同时并发执行的线程数
    public static int threadTotal = 200;

    public static AtomicInteger count = new AtomicInteger(0);

    public static void main(String[] args) throws Exception{

        ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore = new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);

        for(int i=0; i<clientTotal;i++){

            executorService.execute(()-> {

                try {
                    semaphore.acquire();
                    add();
                    semaphore.release();
                } catch (Exception e){
                    log.error("Exceptioin:",e);
                }

                countDownLatch.countDown();
                    }
            );
        }

        countDownLatch.await();
        executorService.shutdown();
        log.info("Count:{}",count.get());
    }

    private static void add(){

        count.incrementAndGet();
    //  count.getAndIncrement();
    }
}
